1) Three men jackhammering at once on my way to pick up an egg sandwich.
2) A man deciding to shout a poetry reading while standing next to me on the subway. (His poem was about an "orange and purple thing" that he stepped in.
3) I saw a snake. A little green one. It wasn't really scary, but it did startle me. I can't imagine that Philadelphia has any wild snakes, so I assume it's an escaped pet.